The seven characteristics of a living organisms include Movement,Respiration, Sensitivity,Growth, Reproduction,Excertion and Nutrient.

The short form to remember is MRS GREN.

The seven characteristics of life are essential because they define what it means for something to be considered "alive." 

These characteristics help us differentiate living things from non-living things and are used to understand how life functions.

Here’s why each characteristic is important:

1. Movement: Living organisms move to respond to their environment, find food, or avoid danger.

2. Respiration: All living organisms need energy, and respiration helps convert food into usable energy.

3. Sensitivity: Organisms respond to stimuli (like light, temperature, or sound), allowing them to adapt to their surroundings.

4. Growth: Living organisms grow and develop, increasing in size and complexity over time.

5. Reproduction: The ability to reproduce ensures the continuation of species.

6. Excretion: Organisms need to get rid of waste products to maintain health and function.

Nutrition: Living things need nutrients to fuel their processes and sustain life.

Without the seven characteristics of life,organisms wouldn't be able to survive. They wouldn't have the ability to move,get energy,grow,respond to their environment,reproduce,get rid of waste, or obtain nutrients. These functions are essential for life,and without them,the organism wouldn't be considered true ''alive''.